On Outage Probability Analysis of Uplink Cooperative VFD-NOMA over Nakagami-m Faded Channels

Abstract

Full-duplex (FD) and non-orthogonal multiple access (NOMA) communications are promising technologies which can efficiently utilize the available scarce spectrum in comparison to the traditional half-duplex (HD) and orthogonal multiple access (OMA) techniques. However, due to high residual self-interference (RSI) in the practical FD systems, virtual FD (VFD) relaying has garned appealing research attention in both academia and industry. In this work, we present a study of an uplink VFD-NOMA system with a base station, two relays, and two cell-edge uplink users, and analyze their performance over generalized Nakagami-m fading channels. Specifically, closed-form expressions of outage probability (OP) for both the users are derived for the considered system model, with the accuracy being verified through rigorous simulations. Moreover, the performance of the users is compared with the conventional FD-NOMA and FD-OMA schemes.